Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 16, Pages 19019-19026Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.09.058
Keywords
C/ZrC-SiC; SiC/ZrC ratio; Mechanical property; Ablation property
Categories
Funding
- Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- Aid Program for Innovative Group of National University of Defense Technology
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Three-dimensional (3D) braided C/ZrC-SiC composites with various SiC/ZrC ratios were fabricated by precursor infiltration and pyrolysis (PIP) process. The effects of SiC/ZrC ratios on the ablation and mechanical properties were investigated systematically. The flexural strength of 3D C/ZrC-SiC grows with the increase of SiC/ZrC ratios. The compact and stiff ZrC-SiC matrix, moreover, the carbon fiber and PyC interphase with the less reaction damage account for the improved flexural strength of C/ZrC-SiC with higher SiC/ZrC ratios. As for the ablation properties, both mass and linear ablation rates drop with the decrease of SiC/ZrC ratios at the beginning. However, the ablation rates start to increase with the further decrease of SiC/ZrC ratio, where the high open porosity deteriorates the ablation properties. Herein, in order to obtain a balance between ablation and mechanical properties, an appropriate SiC/ZrC ratio should be considered. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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